Oleg Stepanov's Weblog

C#/CLR Quiz

Recently I have been writing a managed interface to metadata and found several interesting things which I didn't know before. One of these things can be easily demonstrated with C# code, so I decided to make a quiz (just like Brad Abrams does) Consider the following code snipplets:

1)
using System;

class CustomAttribute : Attribute
{
	public CustomAttribute( string s )
	{
	}
}

[Custom(null)]
class C
{
	
}
================================================
2)
using System;

class CustomAttribute : Attribute
{
	public CustomAttribute( object s )
	{
	}
}

[Custom(null)]
class C
{
	
}
=============================================
3)
using System;

class CustomAttribute : Attribute
{
	public CustomAttribute( object[] s )
	{
	}
}

[Custom(null)]
class C
{
	
}

Exactly one of them doesn't comple. Which one is it and why it doesn't compile?

Hello

Hi, my name is Oleg Stepanov and I'm developer at the ReSharper team. For 1.0 I worked on refactorings and different codeinsight stuff like code completion, live templates, etc. For the current version I primarily work on debugger, so part of my posts here will be related to .NET internals stuff like CLR and metadata.

I also take part in the MPS project (read more in JetBrains CEO Sergey Dmitirev interview to Code Generation Network). Particularly I lead development of DSL for using collections (aka containers). Maybe I will blog something on this too.

I seem to be the second blogger on the blogs.jetbrains.com site (the first is Dmitry Jemerov, the Omea project lead), but I hope as well as Dmitry that you'll see more JetBrains guys here soon.